virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2025-03-28 12:32:17 +02:00
Code Issues Releases Activity

avcodec/aacenc: Avoid 0 lambda

Browse Source 
Fixes: Ticket8003
Fixes: CVE-2020-20453

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-05-28 21:37:26 +02:00
parent 3300625c6f
commit a7a7f32c8a
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
libavcodec/aacenc.c
View File

@ -28,6 +28,7 @@
* TODOs: * TODOs:
* add sane pulse detection * add sane pulse detection
***********************************/ ***********************************/
#include <float.h>
#include "libavutil/libm.h" #include "libavutil/libm.h"
#include "libavutil/float_dsp.h" #include "libavutil/float_dsp.h"
@ -852,7 +853,7 @@ static int aac_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
/* Not so fast though */ /* Not so fast though */
ratio = sqrtf(ratio); ratio = sqrtf(ratio);
} }
s->lambda = FFMIN(s->lambda * ratio, 65536.f); s->lambda = av_clipf(s->lambda * ratio, FLT_MIN, 65536.f);
/* Keep iterating if we must reduce and lambda is in the sky */ /* Keep iterating if we must reduce and lambda is in the sky */
if (ratio > 0.9f && ratio < 1.1f) { if (ratio > 0.9f && ratio < 1.1f) {